<footer class="footer">
  <div class="container">
    <nav class="social">
      {% if site.github_username %}
        <a class="social__link" target="_blank" rel="noopener noreferrer" href="https://github.com/{{ site.github_username }}">
          <svg class="social__icon" viewBox="0 0 20 20" width="20px" height="20px"><path d="M7.999,0.431c-4.285,0-7.76,3.474-7.76,7.761 c0,3.428,2.223,6.337,5.307,7.363c0.388,0.071,0.53-0.168,0.53-0.374c0-0.184-0.007-0.672-0.01-1.32 c-2.159,0.469-2.614-1.04-2.614-1.04c-0.353-0.896-0.862-1.135-0.862-1.135c-0.705-0.481,0.053-0.472,0.053-0.472 c0.779,0.055,1.189,0.8,1.189,0.8c0.692,1.186,1.816,0.843,2.258,0.645c0.071-0.502,0.271-0.843,0.493-1.037 C4.86,11.425,3.049,10.76,3.049,7.786c0-0.847,0.302-1.54,0.799-2.082C3.768,5.507,3.501,4.718,3.924,3.65 c0,0,0.652-0.209,2.134,0.796C6.677,4.273,7.34,4.187,8,4.184c0.659,0.003,1.323,0.089,1.943,0.261 c1.482-1.004,2.132-0.796,2.132-0.796c0.423,1.068,0.157,1.857,0.077,2.054c0.497,0.542,0.798,1.235,0.798,2.082 c0,2.981-1.814,3.637-3.543,3.829c0.279,0.24,0.527,0.713,0.527,1.437c0,1.037-0.01,1.874-0.01,2.129 c0,0.208,0.14,0.449,0.534,0.373c3.081-1.028,5.302-3.935,5.302-7.362C15.76,3.906,12.285,0.431,7.999,0.431z"/></svg>
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      {% endif %}
      {% if site.twitter_username %}
        <a class="social__link" target="_blank" rel="noopener noreferrer" href="https://www.twitter.com/{{ site.twitter_username }}">
          <svg class="social__icon" viewBox="0 0 20 20" width="20px" height="20px"><path d="M15.969,3.058c-0.586,0.26-1.217,0.436-1.878,0.515c0.675-0.405,1.194-1.045,1.438-1.809c-0.632,0.375-1.332,0.647-2.076,0.793c-0.596-0.636-1.446-1.033-2.387-1.033c-1.806,0-3.27,1.464-3.27,3.27 c0,0.256,0.029,0.506,0.085,0.745C5.163,5.404,2.753,4.102,1.14,2.124C0.859,2.607,0.698,3.168,0.698,3.767 c0,1.134,0.577,2.135,1.455,2.722C1.616,6.472,1.112,6.325,0.671,6.08c0,0.014,0,0.027,0,0.041c0,1.584,1.127,2.906,2.623,3.206 C3.02,9.402,2.731,9.442,2.433,9.442c-0.211,0-0.416-0.021-0.615-0.059c0.416,1.299,1.624,2.245,3.055,2.271 c-1.119,0.877-2.529,1.4-4.061,1.4c-0.264,0-0.524-0.015-0.78-0.046c1.447,0.928,3.166,1.469,5.013,1.469 c6.015,0,9.304-4.983,9.304-9.304c0-0.142-0.003-0.283-0.009-0.423C14.976,4.29,15.531,3.714,15.969,3.058z"/></svg>
        </a>
      {% endif %}
      {% if site.instagram_username %}
        <a class="social__link" target="_blank" rel="noopener noreferrer" href="https://www.instagram.com/{{ site.instagram_username }}">
          <svg class="social__icon" viewBox="0 0 20 20" width="20px" height="20px"><path d="M8 0C5.827 0 5.555.01 4.702.048 3.85.088 3.27.222 2.76.42a3.908 3.908 0 0 0-1.417.923c-.445.444-.72.89-.923 1.417-.198.51-.333 1.09-.372 1.942C.008 5.555 0 5.827 0 8s.01 2.445.048 3.298c.04.852.174 1.433.372 1.942.204.526.478.973.923 1.417.444.445.89.72 1.417.923.51.198 1.09.333 1.942.372.853.04 1.125.048 3.298.048s2.445-.01 3.298-.048c.852-.04 1.433-.174 1.942-.372a3.908 3.908 0 0 0 1.417-.923c.445-.444.72-.89.923-1.417.198-.51.333-1.09.372-1.942.04-.853.048-1.125.048-3.298s-.01-2.445-.048-3.298c-.04-.852-.174-1.433-.372-1.942a3.908 3.908 0 0 0-.923-1.417A3.886 3.886 0 0 0 13.24.42c-.51-.198-1.09-.333-1.942-.372C10.445.008 10.173 0 8 0zm0 1.44c2.136 0 2.39.01 3.233.048.78.036 1.203.166 1.485.276.374.145.64.318.92.598.28.28.453.546.598.92.11.282.24.705.276 1.485.038.844.047 1.097.047 3.233s-.01 2.39-.05 3.233c-.04.78-.17 1.203-.28 1.485-.15.374-.32.64-.6.92-.28.28-.55.453-.92.598-.28.11-.71.24-1.49.276-.85.038-1.1.047-3.24.047s-2.39-.01-3.24-.05c-.78-.04-1.21-.17-1.49-.28a2.49 2.49 0 0 1-.92-.6c-.28-.28-.46-.55-.6-.92-.11-.28-.24-.71-.28-1.49-.03-.84-.04-1.1-.04-3.23s.01-2.39.04-3.24c.04-.78.17-1.21.28-1.49.14-.38.32-.64.6-.92.28-.28.54-.46.92-.6.28-.11.7-.24 1.48-.28.85-.03 1.1-.04 3.24-.04zm0 2.452a4.108 4.108 0 1 0 0 8.215 4.108 4.108 0 0 0 0-8.215zm0 6.775a2.667 2.667 0 1 1 0-5.334 2.667 2.667 0 0 1 0 5.334zm5.23-6.937a.96.96 0 1 1-1.92 0 .96.96 0 0 1 1.92 0z"></path></svg>
        </a>
      {% endif %}
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